Urology treats urinary tract diseases in all genders and male reproductive issues, covering the kidneys, bladder, prostate, urethra, from infections to complex cancers.
The Therapeutic Ladder: Matching Treatment to Pathology
Treating hydronephrosis is not the same for everyone. The approach depends on what is causing the problem, how quickly and severely the blockage happened, how the other kidney is working, and whether there are complications like infection or kidney failure. The main goals are to save as much kidney function as possible, relieve symptoms like pain, and fix the underlying cause.
Emergency Decompression (Source Control)
In specific clinical scenarios, the immediate priority is to bypass the blockage to drain infected urine or relieve acute pressure that is causing renal failure. Definitive treatment of the cause (e.g., breaking the stone) is deferred until the patient is stable.
- Indications for Urgent Drainage:
- Obstructed Pyelonephritis (Pyonephrosis): Infection behind a block is surgical sepsis.
- Acute Renal Failure: Rising creatinine, anuria (no urine output) in a solitary kidney or bilateral obstruction.
- Intractable Pain or Vomiting: Failure of medical management.
- Hyperkalemia or fluid overload due to obstruction.
- Methods of Decompression:
- Ureteral Stent (Double-J Stent): A thin, hollow, flexible plastic tube is inserted endoscopically through the urethra and bladder, up the ureter, under fluoroscopic guidance. It has a “J” curl at both ends—one sits in the kidney pelvis, the other in the bladder—to prevent migration. It allows urine to flow down through its lumen and around it, effectively bypassing stones, strictures, or external compression. It is an internal device, not visible from the outside.
- Percutaneous Nephrostomy (PCN): Used when a retrograde stent cannot be placed (e.g., impassable tight stricture, large bladder tumor obscuring the orifice, or altered anatomy). An interventional radiologist or urologist inserts a needle and then a drainage tube directly through the skin of the flank into the dilated renal collecting system under ultrasound/fluoroscopy guidance. This drains urine into an external bag strapped to the leg.
Management of Kidney Stones (Nephrolithiasis)
The approach depends on stone size, location, and symptoms.
- Conservative Management / Medical Expulsive Therapy (MET): For small, uncomplicated distal ureteral stones (<5-6mm) causing mild hydronephrosis without infection, patients are given pain medication (NSAIDs), hydration, and an alpha-blocker such as Tamsulosin. Tamsulosin relaxes the smooth muscle of the distal ureter, increasing the passage rate by up to 30%. Patients are monitored with serial imaging.
- Extracorporeal Shock Wave Lithotripsy (ESWL): Non-invasive treatment for renal or proximal ureteral stones. High-energy acoustic shock waves are focused onto the stone from outside the body, fragmenting it into sand-like dust that passes in the urine.
- Ureteroscopy (URS) with Laser Lithotripsy: The standard of care for most ureteral stones and many kidney stones. A thin, semi-rigid, or flexible fiberoptic scope is passed through the urethra and bladder up to the stone. A Holmium laser fiber is used to vaporize or fragment the stone under direct vision. Fragments are removed with a tiny wire basket.
Surgical Repair of Congenital UPJ Obstruction
When a UPJ obstruction is proven to be functionally significant (obstructive curve on MAG3 scan, loss of function >10%, or symptoms), surgical repair is indicated.
- Pyeloplasty (Anderson-Hynes Dismembered Technique): This is the gold standard surgical procedure. The surgeon identifies the narrowed UPJ segment, surgically excises the diseased aperistaltic area and any redundant dilated renal pelvis tissue, and then meticulously sutures the healthy, wide ureter back to the remaining renal pelvis to create a wide, funnel-shaped, dependent anastomosis.
- Robotic-Assisted Laparoscopic Pyeloplasty: At Liv Hospital, this is the preferred approach for adults and older children. Using the da Vinci surgical system provides 3D high-definition magnification and wristed instruments, enabling extremely precise suturing of delicate ureteral tissues. It offers success rates of 95-98%, with less pain, shorter hospital stays, and faster recovery than traditional open surgery.
Pediatric Management Strategies
Management in children requires balancing the risk of renal damage with the dangers of unnecessary intervention.
- Observation / Active Surveillance: The majority of neonates diagnosed with mild to moderate antenatal hydronephrosis (SFU Grade 1-2) will have spontaneous resolution of the condition within the first 1-2 years of life as the kidney matures. They are monitored with serial ultrasounds.
- Antibiotic Prophylaxis: Children with significant hydronephrosis or high-grade VUR are often placed on low-dose daily antibiotics (e.g., Trimethoprim or Amoxicillin) to prevent febrile urinary tract infections, which are the primary cause of permanent renal scarring in this population.
- Endoscopic Injection (Deflux) for VUR: For persistent moderate-to-high-grade VUR causing infections, a biocompatible bulking gel (Deflux) can be injected endoscopically beneath the ureteral orifice in the bladder. This creates a mound that buttresses the ureteral tunnel, restoring the anti-reflux valve mechanism.
- Ureteral Reimplantation: Major surgery reserved for severe reflux failing other treatments or for distal ureteral obstruction (megaureter). The ureter is detached from the bladder and re-implanted through a new, longer submucosal tunnel to fix the anatomy.
